I'm 40 year old male and I'v been taking ZOCOR for almost 2 years...

I'm 40 year old male and I'v been taking ZOCOR for almost 2 years. I am very active ,working out 3-5 times a week both lifting weights and either running or eliptical training. MY cholesterol was a genetic issue and 20mg of ZOCOR at night has lowered it to normal some what normal ranges. I have noticed that my stools in the morning have been irregular. I have noticed more muscle pains in my legs when I lay down at night. I just recently had had my first ECG and now it appears there may be some sort of irregularly. After reading all the postings, it appears that alot I have a lot of the same side affects and just brushed them off. I now have a consult with a cardiologists. Has anyone else had abnormal ECG's after taking ZOCOR ? richard